Simple and fast determination of catecholamines in pharmaceutical samples using Ag+–3,3′,5,5′-tetramethylbenzidine as a colorimetric probe

Simple and fast determination of catecholamines in pharmaceutical samples using Ag+–3,3′,5,5′-tetramethylbenzidine as a colorimetric probe
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使用 Ag-3,3-2,5,5-四甲基联苯胺作为比色探针简单快速地测定药物样品中的儿茶酚胺

DOI:
10.1039/c5ay01353d
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发表时间:
2015-08
期刊:
影响因子:
3.1
通讯作者:
Jinmao You
Jinmao You
中科院分区:
化学3区
文献类型:
--
作者:
Shuyun Zhu;Jing Yang;Xian-en Zhao;Rongmei Kong;Hua Wang;Jinmao You

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儿茶酚胺,通常包括多巴胺(DA)、肾上腺素(EP)和去甲肾上腺素(NE),是重要的神经递质,并且服务于许多中枢神经系统功能。在这项工作中,一个简单的比色法测定的三种儿茶酚胺。该方法是基于Ag+能氧化3,3 ′,5,5 ′-四甲基联苯胺(TMB)生成氧化型TMB(oxTMB),并在652 nm处产生蓝色吸收峰。然而,儿茶酚胺的引入会导致oxTMB的还原,这导致蓝色快速褪色并且在652 nm处的吸光度降低。基于这一发现,我们提出了一种方法来定量检测的帮助下,紫外-可见光谱的儿茶酚胺。DA、EP和NE的检测限(S/N = 3)分别为50 nM、100 nM和150 nM。更重要的是,这种方法简单,快速,不使用复杂的纳米材料。该方法已成功应用于药物样品中儿茶酚胺的检测。
Catecholamines, generally including dopamine (DA), epinephrine (EP), and norepinephrine (NE), are important neurotransmitters and serve many central nervous system functions. In this work, a simple colorimetric method for the determination of the three catecholamines is developed. The proposed method is based on the fact that Ag+ could oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to oxidized TMB (oxTMB) and induce a blue color solution corresponding to an absorption peak centered at 652 nm. However, the introduction of catecholamines could cause the reduction of oxTMB which results in the fading of the blue color quickly and a decrease of the absorbance at 652 nm. Based on this finding, we propose a method to quantitatively detect catecholamines with the help of UV-vis spectroscopy. The detection limit (S/N = 3) for DA, EP, and NE is 50 nM, 100 nM, and 150 nM, respectively. More importantly, this method is simple, fast and without the use of complicated nanomaterials. This method has been successfully applied to the detection of catecholamines in pharmaceutical samples.
多巴胺水热处理制备的碳点作为有效的荧光传感平台,用于铁(III)离子和多巴胺的无标记检测
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